Selected value for JSP drop down using JSTL

Question

I have SortedMap in Servlet to populate drop down values in JSP and I have the following code      SortedMap lt String  String gt  dept   findDepartment        request setAttribute  dept    dept     and in JSP          lt select name  department  gt             lt c forEach var  item  items    dept   gt               lt option value    item key   gt   item value  lt  option gt             lt  c forEach gt           lt  select gt    I am using one JSP page for insert and update  When I am editing the page how can I set selected value to drop down where selected value will come from database

User · Answer

If you don t mind using jQuery you can use the code bellow        lt script gt         document  ready function                   department   val    requestScope selectedDepartment    attr  selected    selected                   lt  script gt         lt select id  department  name  department  gt         lt c forEach var  item  items    dept   gt           lt option value    item key   gt   item value  lt  option gt         lt  c forEach gt       lt  select gt    In the your Servlet add the following           request setAttribute  selectedDepartment   YOUR SELECTED DEPARTMENT

User · Answer

You can try one even more simple     lt option value  1    item quantity    1    selected        gt 1 lt  option gt

User · Answer

I tried the accepted answer  it did not work   However the simple way to do it is below -   lt option value  1   lt c if test    item quantity    1   gt   lt c out value   selected selected   lt  c if gt  gt 1 lt  option gt   lt option value  2   lt c if test    item quantity    2   gt   lt c out value   selected selected   lt  c if gt  gt 2 lt  option gt   lt option value  3   lt c if test    item quantity    3   gt   lt c out value   selected selected   lt  c if gt  gt 3 lt  option gt    Enjoy

User · Answer

In HTML  the selected option is represented by the presence of the selected attribute on the  lt option gt  element like so    lt option     selected gt     lt  option gt    Or if you re HTML XHTML strict    lt option     selected  selected  gt     lt  option gt    Thus  you just have to let JSP EL print it conditionally  Provided that you ve prepared the selected department as follows   request setAttribute  selectedDept   selectedDept     then this should do    lt select name  department  gt       lt c forEach var  item  items    dept   gt           lt option value    item key     item key    selectedDept    selected  selected         gt   item value  lt  option gt       lt  c forEach gt   lt  select gt    See also    How can I retain HTML form field values in JSP after submitting form to Servlet

User · Answer

Maybe I don t completely understand the accepted answer so it didn t work for me   What i did was simply to check if the variable is null  assign it to a known value from my database  Which seems to be similar to the accepted answer whereby you first declare an known value and set it to selected   lt select name  department  gt       lt c forEach var  item  items    dept   gt           lt option value    item key   gt   item value  lt  option gt       lt  c forEach gt   lt  select gt    because none of the options are selected  thus item   null   lt       if item    null           item    selectedDept     known value from your database         gt    This way if the user then selects another option  my IF clause will not catch it and assign to the fixed value that was declared at the start  My concept could be wrong here but it works for me

User · Answer

Below is Example of simple dropdown using jstl tag   lt form select path  quot cityFrom quot  gt         lt form option value  quot Ghaziabad quot  label  quot Ghaziabad quot   gt         lt form option value  quot Modinagar quot  label  quot Modinagar quot   gt         lt form option value  quot Meerut quot  label  quot Meerut quot   gt         lt form option value  quot Amristar quot  label  quot Amristar quot   gt      lt  form select gt

User · Answer

i tried the last answer from Sandeep Kumar  and i found way more simple     lt option value  1   lt c if test    item key    1   gt  selected  lt  c if gt  gt

User · Answer

I think above examples are correct  but you dont  really need to set   request setAttribute  selectedDept   selectedDept     you can reuse that info from JSTL  just do something like this     lt  DOCTYPE html gt   lt html lang  en  gt   lt   taglib prefix  c  uri  http   java sun com jsp jstl core    gt   lt   taglib prefix  fn  uri  http   java sun com jsp jstl functions    gt   lt head gt       lt script src     js jquery-1 8 1 min js  gt  lt  script gt   lt  head gt   lt body gt       lt c set var  authors  value  aaa bbb ccc ddd eee fff ggg  scope  application    gt       lt c out value  Before     param Author    gt       lt form action  TestSelect action  gt           lt label gt Author              lt select id  Author  name  Author  gt                   lt c forEach items    fn split authors         var  author  gt                       lt option value    author     author    param Author    selected        gt   author  lt  option gt                   lt  c forEach gt               lt  select gt           lt  label gt           lt button type  submit  value  submit  name  Submit  gt  lt  button gt           lt Br gt           lt c out value  After       param Author    gt       lt  form gt   lt  body gt   lt  html gt

[jsp] Selected value for JSP drop down using JSTL

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